214 PROCEEDINGS OF THE ACADEMY OF [1894. 



these the Academy possesses another collection from Hartman's Cave, 

 made last year by Mr. H. C. Mercer during his i-e-exploratiou of 

 that cave,^ and containing among others the only extant cranium of 

 magistey in which the nasal bones are intact. There are also two 

 alcoholic specimens of a cave rat from Wythe Co., Virginia, col- 

 lected in 1868 by Prof. E. D. Cope. These, together with Mr. 

 Stone's types of N. pennsylvanica, two stuffed skins of the same from 

 the Pennsylvania Alleghenies, and an alcoholic specimen shown me 

 from Mammoth Cave, Kentucky, by Mr. G. S. Miller, form the 

 basis of my examinations respecting the relationships, distribution, 

 and probal)le identity of magister and pennsylvanica. Prof Leidy 

 has enumerated the entire collections from these caves, among which 

 he records " 92 mandibular rami, 13 pairs of upper maxilhe, numer- 

 ous limb-bones," etc., of " Neotoma fioridana,'^ which, he states, 

 appear to accord with similar remains referred by Prof. Baird to a 

 supposed extinct* species with the name of Neotoma magister." Most 

 of these still exist in the Academy. The Durham Cave material is 

 more scanty, but includes a more complete cranium (No. 8,542) than 

 any from the Stroudsburg Cave. This cranium lacks nasals, ptery- 

 goids, right squamosal, malar, and occipital bones, and is from a rat 

 hardly one year old. 



The subjoined table of measurements, in millimeters, of the best 

 of this material, together with those of N. fioridana, kindly furnished 

 me by Messrs, H. H. & C. S. Brimley, may be considered ample 

 enough for a critical comparison between the forms in question: — 



3 Proc. Acad. Nat. Sci., Phila., 1894, p. f)6. 

 * Italics mine. 



